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compiler: __offsetof keyword for C offsetof() macro
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31b7991a93
commit
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@ -400,4 +400,3 @@ fn C.WaitForSingleObject(voidptr, int) int
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fn C.ReleaseMutex(voidptr) bool
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@ -20,6 +20,10 @@ const (
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#define TCCSKIP(x)
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#endif
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// for __offset_of
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#define __offsetof(s,memb) \\
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((size_t)((char *)&((s *)0)->memb - (char *)0))
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#define OPTION_CAST(x) (x)
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'
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c_headers = '
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@ -227,6 +227,7 @@ fn (p mut Parser) name_expr() string {
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p.string_expr()
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return 'charptr'
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}
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// known_type := p.table.known_type(name)
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orig_name := name
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is_c := name == 'C' && p.peek() == .dot
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@ -718,6 +719,21 @@ fn (p mut Parser) factor() string {
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// p.fgen('$sizeof_typ)')
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return 'int'
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}
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.key_offsetof {
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p.next()
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p.check(.lpar)
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offsetof_typ := p.get_type()
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p.check(.comma)
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member := p.check_name()
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p.check(.rpar)
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p.gen('__offsetof($offsetof_typ, $member)')
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return 'int'
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}
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.amp, .dot, .mul {
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// (dot is for enum vals: `.green`)
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return p.name_expr()
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@ -108,6 +108,7 @@ enum TokenKind {
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key_return
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key_select
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key_sizeof
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key_offsetof
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key_struct
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key_switch
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key_true
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@ -237,11 +238,12 @@ fn build_token_str() []string {
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s[TokenKind.key_match] = 'match'
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s[TokenKind.key_select] = 'select'
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s[TokenKind.key_none] = 'none'
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s[TokenKind.key_offsetof] = '__offsetof'
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return s
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}
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const (
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NrTokens = 140
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NrTokens = 141
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TokenStr = build_token_str()
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KEYWORDS = build_keys()
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)
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